The UHSAS is an optical-scattering, laser-based aerosol particle spectrometer for sizing particles in the 0.06 – 1 µm range. The instrument counts particles in up to 100 user-specified sizing bins, with a resolution as fine as 1 nm/bin. This high sensitivity makes the UHSAS ideal for aerosol research and filter testingVaisala AVAPS Dropsonde Receiving System and Vaisala Dropsonde RD41 represent the latest in dropsounding technology, utilizing an onboard dropsonde microprocessor and synthesized digital transmission. The combination offers atmospheric researchers a complete vertical solution for accurate in-situ measurement of temperature and humidity of the atmosphere. | 
